Abstract: (NaBi)_x（Li La）_yBi₂Nb₂O₉ piezoelectric ceramics were prepared by the conventional solid state reaction method,the preparation processing of（NaBi）_x（Li La）_yBi₂Nb₂O₉ piezoelectric ceramics was studied.The（NaBi）_x（Li La）_yBi₂Nb₂O₉ ceramics sintered at 1130℃displayed the maximum density.When polarization voltage is 13kV/mm,the piezoelectric constant of（NaBi）_x（Li La）_yBi₂Nb₂O₉ piezoelectric ceramics was the biggest.The（NaBi）_x（Li La）_yBi₂Nb₂O₉ ceramics were assembled into compressed sensor,the sensitivity of the sensor was 51.96pC/g and the horizontal sensitivity was 0.7%when the test temperature was 25℃.When the vibration frequency was between 20Hz and 4000Hz,the deviation of sensitivity was between-10%and 10%.Besides,the deviation of sensitivity was all less than 12% when the test temperature was between 25℃ and 530℃.